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トイオ・プレイグラウンド コマンド

カードを使ってプログラミングの基礎を学べる「トイオ・プレイグラウンド コマンド」が5月14日に発売 - GAME Watch

メモ

バウアー

こうなったか

ブレンパワード

【TV本編】「ブレンパワード」第01話〔サンチャン〕 - YouTube

始まった

Clojure: The Documentary

Clojure: The Documentary [OFFICIAL TRAILER] | Coming April 16th! 🚨 - YouTube

DRAM

WG 14

WG 14 Document log

ふと、issueをまとめたページがあるのに気がついた

C standard issues lists

  • C90 (superseded)
    • Summary (one page per issue)
    • Full issue log (all issues on one page)
  • C99 (superseded)
    • Summary (one page per issue)
    • Full issue log (all issues on one page)
  • C11 / C17 (superseded)
    • Summary (one page per issue)
    • Full issue log (all issues on one page)
  • C23
    • Summary (one page per issue)
    • Full issue log (all issues on one page)
  • Floating-point TS 18661 (C11 version, 2014-2016) (superseded)
    • Summary (one page per issue)
    • Full issue log (all issues on one page)
  • Floating-point TS 18661 (C23 version, 2025)
    • Summary (one page per issue)
    • Full issue log (all issues on one page)
  • Secure Coding Rules TS 17961:2013
    • Summary (one page per issue)
    • Full issue log (all issues on one page)

以下省略

古いのを見てもなかなか面白そうで、C90の最初の方を見るとこんな感じ

Issue Summary Status
0001 Do functions return values by copying? Fixed in C90 TC1
0002 Should \ be escaped within macro actual parameters? Closed
0003.01 Are preprocessing numbers too inclusive? Closed
0003.02 Should white space surround macro substitutions? Closed
0003.03 Is an empty macro argument a constraint violation? Closed
0003.04 Should preprocessing directives be permitted within macro invokations? Closed
0004 Are multiple definitions of unused identifiers with external linkage permitted? Fixed in C90

新刊近刊

n月刊ラムダノート

忘れないうちに買っておかねば

リトル・ルービン欠測データの統計解析

ね、値段が

awk

gawk

正規表現ライブラリがMinRXになって遅くなったという話らしいんだけど…?

Re: Matching all Unicode characters

LC_ALL=C GAWK_GNU_MATCHERS=1 gawk -e "$__code__" "$m2p" 0.26s user 0.13s system 
97% cpu 0.404 total

LC_ALL=C gawk -e "$__code__" "$m2p" 7.54s user 0.20s system 99% cpu 7.746 total

Re: Matching all Unicode characters

OK, so please use the GNU matcher for as long as this difference exists and is of such importance for you.

Re: Matching all Unicode characters

You should perhaps consider using tools that are more suited to such data, such perl, python or ruby.

ほかにも気になるのがいくつか(あとでよむ

Re: [Security] 32-bit integer overflow in do_sub() ampersands×matchlen c

Actually, the whole report is specious. size_t on a 32-bit system is only 4 bytes long. In any case the glibc malloc dies:

gawk 5.4.0 gsub/sub bug on non-utf8 multibyte locale

        $ gawk --version | head -1           
        GNU Awk 5.4.0, API 4.1, PMA Avon 8-g1
        $ echo 'aaca' | LANG=ja_JP.ujis gawk '{gsub(/a/,"b");print}'
        bbca            # should be 'bbcb'
        $ echo 'aaca' | LANG=ja_JP.utf8 gawk '{gsub(/a/,"b");print}'
        bbcb            # correct
        $ echo 'aaca' | LANG=C gawk '{gsub(/a/,"b");print}'
        bbcb            # correct

Re: Matching all Unicode characters

The problem is not a general problem with MinRX, but rather with the specific regex ^$. The GNU matchers have an optimization for cases where a regex is anchored with ^ but can never match, and can thus return failure to match immediately, without scanning the data to be matched.

MinRX was lacking such an optimization. Mike Haertel has added one, and that is the main part of the attached patch. Wth this patch, the test case runs as fast or faster with MinRX as it does with the GNU matcher.

Re: [Security] Use-After-Free in do_getline_redir() via two-way pipe NON

diff --git a/io.c b/io.c
index d1700752..b48f14ea 100644
--- a/io.c
+++ b/io.c
@@ -2852,21 +2852,24 @@ do_getline_redir(int into_variable, enum redirval redirtype)
 	redir_exp = TOP();
 	redir_exp = elem_new_to_scalar(redir_exp);
 	rp = redirect(redir_exp, redirtype, & redir_error, false);
-	DEREF(redir_exp);
 	decr_sp();
 	if (rp == NULL) {
 		if (redir_error) { /* failed redirect */
 			update_ERRNO_int(redir_error);
 		}
+		DEREF(redir_exp);
 		return make_number((AWKNUM) -1.0);
 	} else if ((rp->flag & RED_TWOWAY) != 0 && rp->iop == NULL) {
 		if (is_non_fatal_redirect(redir_exp->stptr, redir_exp->stlen)) {
 			update_ERRNO_int(EBADF);
+			DEREF(redir_exp);
 			return make_number((AWKNUM) -1.0);
 		}
 		(void) close_rp(rp, CLOSE_ALL);
+		DEREF(redir_exp);	// we're about to die, but what the heck, release it anyway
 		fatal(_("getline: attempt to read from closed read end of two-way pipe"));
 	}
+	DEREF(redir_exp);
 	iop = rp->iop;
 	if (iop == NULL)		/* end of input */
 		return make_number((AWKNUM) 0.0);

あー、else if ((rp->flag & RED_TWOWAY) != 0 && rp->iop == NULL) のところで、すでにDEREFしたredir_expを参照しちゃってる is_non_fatal_redirect(redir_exp->stptr, redir_exp->stlen) のか

しかしDEREF(redir_exp);が複数個所に散らばるのも あまりうれしくはないすねえ…

Hugo メモ

着々とバージョン上がってるなあ

C++20 Coroutines

なぜに最初に中国語? と思ったのだけど、

The post was written in Chinese and translated by LLM. Feel free to contact me if any phrasing seems unnatural.

大本は中国語版と。

ところで

优化はなかなかわからなかった

ギャ〇ンドゥ

納豆売り

映像化

観たいなあ＞ダゴン星域会戦記の映像化

元祖

最初自分も勘違いしてしまったのだけど、 「ロボット」がでかい大砲持って…というシチュエーションではなくて、 ラスボス倒すのに初期装備とか旧機種でという話だったらしい。

それはそれとして、 自分は「ロボット」がでかい大砲持って…というのは実はあまり好きではない。 というかキライ(笑)

とは言いつつもザンボット3のイオン砲(元はキングビアルのもの)とか MHのバスターランチャー(とイデオンの波導ガン)などは例外としてあるのだけど、 Zで出てきたメガバズーカランチャーなんかは以下略

きゅるる

トラブルシューティング

なかなか興味深い事例がいろいろ

銀河の歴史がまた一ページ

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